how is he cruel? he is heavily pregnant - with an alpha he despises, a beta who he also despises and which despises him back, he found out he is no longer na alpha so it's harder for him to get a good job.. the list goes on and on. how exactly do you want him to react to this situation??
His behavior is understandable, but not acceptable. Becoming an omega was unavoidable, getting pregnant was partly his own fault and keeping the baby was partly his own decision. Having a hard time is no excuse for being rude towards someone else. The seme is not innocent, but at least he takes responsibility for his own actions.
I am usually biased towards the uke, but this uke is too cruel. I do not like him.